Minimalist Interior Visualization(Lighting Test)

Hey !
On the begginging I thought we are working on the same flat, but no, it’s just very, very simmilar. That’s funny because the flat i’am working on is the same dimmensions but has one more tiny room on the other side of the corridor, and different windows shapes. Although I have made few projects in EU4 allready and i thought i am able to set up lighting properly i can’t get satisfactonary results.

I fully understand double UV mapping, am using spot lights on reflecting planes to cause a decent indirect lighting, diffuse boost on 1 and exposure 1.5/1.5/1 without good effect. I have also made ‘black boxes’ around and inside every wall. I had no errors while batch importing scene to UE4, no errors on maps. Maps resolution is set as high as 512 for all meshes. All walls are the same material but look different. One of the wall is plain white after light build but it should be black as there is no light source of any kind, all the setting for that wall are same to others. I am very confused right now, moreover my logitech mx anywhere went crazy with left button what makes me just mad.

Please help me with some advice cause my deadline is getting close. Screenshots are form high/default build (1), and Koola’s .ini setting on production (2). (my previous demo: Biecz hillview house UE4 archviz Czech Architektów - YouTube)

(1)